I wish to replace a broken Kluson style machine head with a new machine head. The new machine head looks the same and matches the headstock screw holes, but it has a 6mm shaft instead of a 1/4" shaft, it's a wee bit sloppy. I am considering replacing the bushing as well, but have stumbled: The old bushing is in a stepped hole. I cannot press the bushing from behind, there's only a ~1/4" (bit bigger) hole at the rear. I wonder about finish adhering to the bushing? The answer might be well be to obtain a matching machine head with a 1/4" shaft. However, if you had to remove a bushing from a stepped hole cleanly, what are your tricks? Thanks! Edit: maybe this technique with a 1/4" inch drill shaft (or just over) that closely fitted the hole?